Evolution of Generic Varying-Tension Cosmic Strings in Expanding Spacetimes
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866918277521866752 |
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| author | Chun, Hubert Lau Sze Conlon, Joseph |
| author_facet | Chun, Hubert Lau Sze Conlon, Joseph |
| contents | It has recently been realised that strings with time-dependent tensions exhibit interesting dynamics; in particular, when the tension decreases loops of string can grow and possibly percolate. We extend previous analytic studies of strings with time-dependent tensions to numerical studies of non-circular loops. We show that the dynamics of a varying-tension string in expanding universe is mathematically equivalent to the evolution of a fixed-tension string in a universe with a modified scale factor. We use numerical solvers and machine learning techniques to explore the dynamics of non-circular string loops with radii close to the Hubble scale. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2512_05170 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Evolution of Generic Varying-Tension Cosmic Strings in Expanding Spacetimes Chun, Hubert Lau Sze Conlon, Joseph High Energy Physics - Theory High Energy Physics - Phenomenology 83E30 It has recently been realised that strings with time-dependent tensions exhibit interesting dynamics; in particular, when the tension decreases loops of string can grow and possibly percolate. We extend previous analytic studies of strings with time-dependent tensions to numerical studies of non-circular loops. We show that the dynamics of a varying-tension string in expanding universe is mathematically equivalent to the evolution of a fixed-tension string in a universe with a modified scale factor. We use numerical solvers and machine learning techniques to explore the dynamics of non-circular string loops with radii close to the Hubble scale. |
| title | Evolution of Generic Varying-Tension Cosmic Strings in Expanding Spacetimes |
| topic | High Energy Physics - Theory High Energy Physics - Phenomenology 83E30 |
| url | https://arxiv.org/abs/2512.05170 |